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Home Q & A Board Biology-Related Homework Help General Biology
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purpleberry purpleberry
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7 years ago
According to scientists, how do the levels of carbon dioxide in the atmosphere today compare to the past 400,000 years?
A) There's more atmospheric carbon dioxide today.
B) There's less atmospheric carbon dioxide today.
C) There have been no changes in atmospheric carbon dioxide levels.
D) Atmospheric carbon dioxide levels have fluctuated randomly.
Textbook 
Biology: Science for Life with Physiology

Biology: Science for Life with Physiology


Edition: 5th
Authors:
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cameronicameroni
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7 years ago
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purpleberry Author
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#2
6 years ago
Great answer!!!
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